For a Christian to be a Christian, he must first be a sinner. Being a sinner is a prerequisite for being a church member. The Christian church is one of the few organizations in the world that requires a public acknowledgement of sin as a condition for membership.

Doctrine does matter.

In Reformed theology, if God is not sovereign over the entire created order, then he is not sovereign at all. The term sovereignty too easily becomes a chimera. If God is not sovereign, then he is not God.

It is the Holy Spirit who inspired the Bible. It is the Holy Spirit who illumines the Bible.

Grace and mercy are never deserved.

The Bible's truth does not depend in any way on whether or not a person believes the truth.

To live coram Deo is to live one’s entire life in the presence of God, under the authority of God, to the glory of God.